Only listen for stdin close on TTYs (#8523)

Author: thecrypticace

src/cli.js

@@ -875,8 +875,10 @@ async function build() {
 
   if (shouldWatch) {
     /* Abort the watcher if stdin is closed to avoid zombie processes */
-    process.stdin.on('end', () => process.exit(0))
-    process.stdin.resume()
+    if (process.stdin.isTTY) {
+      process.stdin.on('end', () => process.exit(0))
+      process.stdin.resume()
+    }
     startWatcher()
   } else {
     buildOnce()